21 
B. Investigations of the author in 1895, 1896, Ig0o5 and 1906 etc. 
For a rapid glance over the hydrographical conditions in the Lim Fjord I 
may give here some measurements of the specific gravity of the water, made 
duringa vovage of »Havørnen« from September 4th—1lth 1890: 
Temperature  Salinity in "/, 
At Gjøl was found a specific gravity of 1,0200 15, "C. eg 
»… Løgstør » SUEE> » » EKO ZOND 2 69 
»… Fuur » » » » » » 1,0215 5 » TE 
In Launs Bredning » So » ”» See ON Br OS LSE ne 
Virk-Sund » SEN » » SEE OTA GEDE ls 
» Skive Fjord » » » » » 110173 14, » FAE: 
West of Fuur » BØN ES ” » SODE Ds 2 
At Ør Odde » » » » » » 1,0230 185% > 2705 
In Kaas Bredning » SEES » ”» SEK OPDBE REED FEE 30E 
North of Jegindø » BE » se BO22Æ AB 5 re 
At Kaas Head » ”» 53 » » SME 023 6 ENS E 5 BIM 
East of Venø » SEES » » SEMKOPS SETS 305 
At Struer »  EAR2) » SE 02565 330 
In Nissum Bredning » sd ng » » SIF ODÆS EET SEES Br 
At Krik » BD ” » SEN ONS GELSE 239 
» Lemvig » » » » » » 1,0246 Il TE 3448 
E. of Skibsted Fjord » »” » » » » 1,0200 TD » Eg 
In Visby Bredning ” ,» 0» » » SE 0200 MAE NG 
E. of Thisted Br. , , » » » SEE OZOS TESTE PER 
At Nibe » BE% » » 1,0180 14, 208 
The salinities given above are marked on the Chart accompanying this 
paper with exception of the last at Nibe, which falls outside the chart. It will be 
noticed that wherever the salinity is over 2,,,"/, oysters are found, and none on 
the other hand where it is under 2,,,/,. Thus there are none at Krik, in Launs 
Bredning and Skive Fjord or east of Troldholmene. The salinity was however 
high at Gjøl, but it must be remembered that in the narrow, eastern part of the 
Lim Fjord the salinity is so extremely variable, that a momentary picture cannot 
be considered as giving any useful guide to the conditions there. This variation 
can also be seen from the above figures, as at Nibe (at the outlet) only 2,5. "/, 
was found 7 days after the observation of 2,;,"/, at Gjøl. On both days the 
salinity was most probably the same at both places. 
The salinity has thus undoubtedly a very distinct influence on the distri- 
bution of the oysters in the Lim Fjord, but it is impossible for me to state the 
